Prepare Oats
Blend the oats into coarse powder and use 1 cup for idli preparation. remaining you can store it in a box and use them for other recipes.

Preparation
Take few tsps of oil in a pan and put Basic popu.
Now add semolina and roast it till golden brown. Add Oats powder to the semolina mixture and let it heat up.
Let the entire mixture cool down and add Yogurt/Buttermilk until the consistency to make as idli. Add baking powder, salt to the mixture. The batter looks almost exactly like the batter for Vermicelli Idli.
Now, place the batter in the idli plates and cook them on steam for just 12 mins.
Take out idlis from plates, and serve them hot with peanut chutney or any other chutney of your choice.